python-opengl 3.0.1~b2-1 / usr / share / pyshared / OpenGL / constants.py

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"""OpenGL-wide constant types (not OpenGL.GL-specific)

These are basically the fundamental data-types that OpenGL 
uses (note, doesn't include the OpenGL-ES types!)
"""
import ctypes
from OpenGL.constant import Constant

GL_FALSE = Constant( 'GL_FALSE', 0x0 )
GL_TRUE = Constant( 'GL_TRUE', 0x1 )
GL_BYTE = Constant( 'GL_BYTE', 0x1400 )
GL_UNSIGNED_BYTE = Constant( 'GL_UNSIGNED_BYTE', 0x1401 )
GL_SHORT = Constant( 'GL_SHORT', 0x1402 )
GL_UNSIGNED_SHORT = Constant( 'GL_UNSIGNED_SHORT', 0x1403 )
GL_INT = Constant( 'GL_INT', 0x1404 )
GL_UNSIGNED_INT = Constant( 'GL_UNSIGNED_INT', 0x1405 )
GL_UNSIGNED_INT64 = Constant( 'GL_UNSIGNED_INT64_AMD', 0x8BC2 )
GL_FLOAT = Constant( 'GL_FLOAT', 0x1406 )
GL_DOUBLE = Constant( 'GL_DOUBLE', 0x140a )
GL_CHAR = str
GL_HALF_NV = Constant( 'GL_HALF_NV', 0x1401 )

ctypes_version = [int(i) for i in ctypes.__version__.split('.')[:3]]

# Basic OpenGL data-types as ctypes declarations...
def _defineType( name, baseType, convertFunc = long ):
    import OpenGL
    do_wrapping = (
        OpenGL.ALLOW_NUMPY_SCALARS or # explicitly require
        (( # or we are using Python 2.5.x ctypes which doesn't support uint type numpy scalars
            ctypes_version < [1,1,0]
            and baseType in (ctypes.c_uint,ctypes.c_uint64,ctypes.c_ulong,ctypes.c_ushort)
        ) or
        ( # or we are using Python 2.5.x (x < 2) ctypes which doesn't support any numpy int scalars
            ctypes_version < [1,0,2]
            and baseType in (ctypes.c_int,ctypes.c_int64,ctypes.c_long,ctypes.c_short)
        ))
    )
    if do_wrapping:
        original = baseType.from_param
        if not getattr( original, 'from_param_numpy_scalar', False ):
            def from_param( x, typeCode=None ):
                try:
                    return original( x )
                except TypeError, err:
                    try:
                        return original( convertFunc(x) )
                    except TypeError, err2:
                        raise err
            from_param = staticmethod( from_param )
            setattr( baseType, 'from_param', from_param )
            baseType.from_param_numpy_scalar = True
        return baseType
    else:
        return baseType

GLvoid = None
GLboolean = _defineType( 'GLboolean', ctypes.c_ubyte, bool )
GLenum = _defineType( 'GLenum', ctypes.c_uint )

GLfloat = _defineType( 'GLfloat', ctypes.c_float, float )
GLfloat_2 = GLfloat * 2
GLfloat_3 = GLfloat * 3
GLfloat_4 = GLfloat * 4
GLdouble = _defineType( 'GLdouble', ctypes.c_double, float )
GLdouble_2 = GLdouble * 2
GLdouble_3 = GLdouble * 3
GLdouble_4 = GLdouble * 4

GLbyte = ctypes.c_byte
GLshort = _defineType( 'GLshort', ctypes.c_short, int )
GLint = _defineType( 'GLint', ctypes.c_int, int )
GLuint = _defineType( 'GLuint', ctypes.c_uint, long )

GLsizei = _defineType( 'GLsizei', ctypes.c_int, int )

GLubyte = ctypes.c_ubyte
GLubyte_3 = GLubyte * 3
GLushort = _defineType( 'GLushort', ctypes.c_ushort, int )
GLhandleARB = _defineType( 'GLhandleARB', ctypes.c_uint, long )
GLhandle = _defineType( 'GLhandle', ctypes.c_uint, long )

GLchar = GLcharARB = ctypes.c_char

GLbitfield = _defineType( 'GLbitfield', ctypes.c_uint, long )

GLclampd = _defineType( 'GLclampd', ctypes.c_double, float )
GLclampf = _defineType( 'GLclampf', ctypes.c_float, float )

GLuint64 = GLuint64EXT = _defineType('GLuint64', ctypes.c_uint64, long )
GLint64 = GLint64EXT = _defineType('GLint64', ctypes.c_int64, long )

# ptrdiff_t, actually...
GLsizeiptrARB = GLsizeiptr = GLsizei
GLintptrARB = GLintptr = GLint
size_t = ctypes.c_ulong

void = None

GLhalfNV = GLhalfARB = ctypes.c_ushort

# GL.ARB.sync extension, GLsync is an opaque pointer to a struct 
# in the extensions header, basically just a "token" that can be 
# passed to the various operations...
GLsync = ctypes.c_void_p 


ARRAY_TYPE_TO_CONSTANT = [
    ('GLclampd', GL_DOUBLE),
    ('GLclampf', GL_FLOAT),
    ('GLfloat', GL_FLOAT),
    ('GLdouble', GL_DOUBLE),
    ('GLbyte', GL_BYTE),
    ('GLshort', GL_SHORT),
    ('GLint', GL_INT),
    ('GLubyte', GL_UNSIGNED_BYTE),
    ('GLushort', GL_UNSIGNED_SHORT),
    ('GLuint', GL_UNSIGNED_INT),
    ('GLenum', GL_UNSIGNED_INT),
]

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